Black cubic, shiny ?
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  1. #1
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting

    Black cubic, shiny ?

    Click image for larger version. 

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Size:	1.65 MB 
ID:	1286070 not sure what this one is either. Thanks you all for your help Click image for larger version. 

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ID:	1286072
    Last edited by shaman15771; Mar 16, 2016 at 06:36 AM.

  2. #2
    us
    Mar 2014
    Traveling US to work
    Current Equinox 600 Past Whites DFX Garret GTI 2500 and others Prospecting Minelab GPZ 7000 Past SD 2100 GP 3000 (retired)
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    Been a while shaman Cant say for certian what you have. About how hard is it and what kind of streak does it have? Might check for magnetism as well.
    shaman15771 likes this.
    Everyone Believes they have gold buried in the back yard... small wonder so few ever look for it.

  3. #3
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    Hi DD, been a while been having problems uploading pictures. Looks it might be resolved. Streak is white, deep scratch in glass, no magnetism, steel will give very light scratch, not sure, might be residue from nail.most interesting is form which is very cubic. Also got what might be some sort of carving like a snake made of multicolored quartz. Will try and upload it shortly.
    Last edited by shaman15771; Mar 16, 2016 at 12:30 PM.

  4. #4
    us
    Aug 2012
    New Mexico USA
    My Head
    2,357
    1887 times
    Interesting. I went on a trip Saturday to a mine south of here that mined Psilomelane for the manganese. The overburden
    from the mine was rhyolite with the psilomelane appeared painted on the rhyolite not unlike your rocks.
    The streak was white to grey.
    Not much to look at but I did find some with calcite inclusions that were interesting.

    I'll try to post pictures.

    One puzzle was I wanted to see what signal I might get on my detector but I got none.
    As manganese is between iron and chromium on the PT I thought I should get something. It might be that the
    sample was too thin to effect the signal. Can you test your rocks with your Fisher?
    Chop wood..Carry water

  5. #5
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GM2, GM3, DFX, Coinmaster, TDI-SL, GM24K, Falcon MD20, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
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    I was thinking rhyolite myself, but not sure.
    Jim

  6. #6
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    Hi all, can't be rhyolite that's igneous rock, we have metamorphic here. No igneous at all according to usgs.

  7. #7
    Charter Member
    us
    Jul 2012
    Blackfoot, Idaho
    White's GM2, GM3, DFX, Coinmaster, TDI-SL, GM24K, Falcon MD20, old Garrett Masterhunter BFO 'Way Too Cool' dual 18 Watt UV light
    2,858
    3724 times
    Prospecting
    I'd like to see a magnified image of the black material.
    Jim

  8. #8
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    K see if I can. It's very smooth.

  9. #9
    se
    Sep 2006
    Sweden
    White's V3, Minelab Explorer II & XP Deus.
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    Resembles chalcedony. I think this one does, but rhyolite, when metamorphosed can look similar.
    Geologists are gneiss, tuff, and a little wacke.

  10. #10
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    Black chalcedony? Isn't that onyx?

  11. #11
    se
    Sep 2006
    Sweden
    White's V3, Minelab Explorer II & XP Deus.
    6,484
    2102 times
    Prospecting
    Onyx has a white banding to accompany the black. So it's not onyx, sorry.
    Geologists are gneiss, tuff, and a little wacke.

  12. #12
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    K didn't know chalcedony came in black

  13. #13
    us
    Mar 2014
    Traveling US to work
    Current Equinox 600 Past Whites DFX Garret GTI 2500 and others Prospecting Minelab GPZ 7000 Past SD 2100 GP 3000 (retired)
    2,278
    1946 times
    All Types Of Treasure Hunting
    Been weathering other projects.... dark chalcedony is as close as I can guess as well. Chalcedony is usually a light material but dependent on what's mixed in can be almost obsidian like. Your samples pretty uniform as well so a type of potch opal is possible to. Being cubit may just be a result of how it fractured out. Apologies for the late reply.
    shaman15771 and Eu_citzen like this.
    Everyone Believes they have gold buried in the back yard... small wonder so few ever look for it.

  14. #14
    us
    May 2014
    SW VIRGINIA
    fisher
    321
    117 times
    All Types Of Treasure Hunting
    Thanks DD!

  15. #15
    us
    Brian T. Booth

    Feb 2013
    Glasgow KY
    Minelab: Eureka Gold
    299
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    All Types Of Treasure Hunting

    Black cubic, shiny ?

    Looks to be a rock with possible MnO staining. That black coloration isn't incorporated into the the rock it's coating the rock.

 

 
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